Phytoplankton community structure and biodiversity assessment of Golbolagh Reservoir, Kurdistan Province

Golbolagh Reservoir is located the east of Kurdistan province with 8.1 Million cubic meters' capacity. This study was conducted for one year to investigate the population structure, diversity and seasonal change of phytoplankton of Golbolagh Lake. Some physicochemical parameters of this water body at each sampling site were studied. In this study, 6 phylum, 22 families and 23 genus of phytoplankton were identified; 10 genus belonging to Bacillariophyta, 6 genus belonging to Chlorophyta, 4 genus belonging to Cyanophyta, 1 genus belonging to Euglenaophyta, one genus belonging to Crysophyta and one genus belonging to Dynophyta. The mean annual density of phytoplankton was 1662 (cell/ml). The average density of Bacillariophyta was 1196 per ml with 30 percent frequency, while average density of Euglenaophyta was 791 per ml with 2 percent frequency, respectively and the highest and lowest density and abundance of phytoplankton, they were allocated and were statistically significant compared to other branches (P <0/05). Margalef richness and Shannon-Wiener diversity indexes were calculated. The two index were compared between seasons sampling and between stations, with no observed significant difference between stations, however, there was a significant difference between seasons sampling (P <0/05).